Definition of the range and distribution of human immunodeficiency virus macrophage tropism using PCR-based infectivity measurements

M. Collin, P. Illei, W. James, S. Gordon

Research output: Contribution to journalArticlepeer-review

Abstract

The tropism of human immunodeficiency virus (HIV) for macrophages (m∅) is a well recognized phenomenon, but the range and distribution of m∅-tropic phenotypes have not been defined by quantitative means. This study uses a PCR-based infectivity assay to derive an index of m∅ tropism for several common strains of HIV. The results show that m∅ tropism varies over about six orders of magnitude and that the most m∅-tropic strains have a higher infectivity for m∅ than for peripheral blood lymphocytes. Strains were distributed throughout this range, suggesting that m∅ tropism is a continuously variable phenotypic property. Although the degree of tropism was strongly influenced by the mode of isolation and propagation of virus strains, there was no evidence for the existence of distinct m∅-tropic or non-m∅-tropic phenotypes. Finally, the tropism of two selected strains was found to be determined by an early step in replication, probably virus entry.

Original languageEnglish (US)
Pages (from-to)1597-1603
Number of pages7
JournalJournal of General Virology
Volume75
Issue number7
DOIs
StatePublished - 1994

ASJC Scopus subject areas

  • Virology

Fingerprint Dive into the research topics of 'Definition of the range and distribution of human immunodeficiency virus macrophage tropism using PCR-based infectivity measurements'. Together they form a unique fingerprint.

Cite this